Ground-state properties of microcavity polariton condensates at arbitrary excitation density

Kenji Kamide and Tetsuo Ogawa
Phys. Rev. B 83, 165319 – Published 25 April 2011

Abstract

The ground state of microcavity polariton Bose-Einstein condensates (BEC’s) is determined as a function of experimentally tunable parameters (the excitation density and the detuning of cavity photons), and also a material parameter (the ultraviolet cutoff). To obtain the ground state at an arbitrary excitation density, an interpolation method for the BEC-BCS crossover of excitonic insulators is extended to microcavity polariton systems in two or three dimensions. The ground state of the condensate changes from excitonic to photonic with an increase in the excitation density. This change is accompanied by several interesting features: (i) A laserlike input (excitation density) and output (photon density) relation with a sharp onset for largely detuned systems, which changes to that with a smooth onset for slightly detuned systems. (ii) The origin of the binding force of electron-hole pairs changes from Coulomb attraction to photon-mediated interactions, resulting in the formation of strongly bound pairs with a small radius, such as Frenkel excitons, in the photonic regime. The change in the ground state can be a crossover or a first-order transition, depending on the above-mentioned parameters, and is studied by plotting phase diagrams.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
7 More
  • Received 5 October 2010

DOI:https://doi.org/10.1103/PhysRevB.83.165319

©2011 American Physical Society

Authors & Affiliations

Kenji Kamide* and Tetsuo Ogawa

  • Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan

  • *kamide@acty.phys.sci.osaka-u.ac.jp

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 83, Iss. 16 — 15 April 2011

Reuse & Permissions
Access Options

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×